README additions including FAQs and docs on testing
README additions including FAQs and docs on testing

image-tester/statesman,eljojo/statesman,gocardless/statesman,div/statesman,mmontalvo/statesman,div/statesman,image-tester/statesman,mkcode/statesmin,eljojo/statesman,timothyp/statesman,pacso/statesman,gocardless/statesman,timothyp/statesman,pacso/statesman,mmontalvo/statesman